An example of Melkersson subcategory which is not closed under injective hulls
classification
🧮 math.AC
keywords
subcategorymelkerssonclosedhullsinjectivequestionserreunder
read the original abstract
The Melkersson subcategory is a special Serre subcategory. It was proved that a Serre subcategory which is closed under injective hulls is a Melkersson subcategory. However, it has been an open question whether the contrary implication holds. In this paper, we shall show that this question has a negative answer in general.
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